[AlejandroBarba]

Hi OTMRookie,

You are correct, if the flat rate applies to the whole state you can define the rate for the same state.

In the same way if the USZIP3 covers all the USZIP5 definitions, it is better to use the more general definitions that having to go through all the hazzle of defining all the potential USZIP5 if there is no actual need to. Besides, every year new USZIP5 are created and that could cause you a maintenance issue.

Hope this helps,

Alejandro B.